If today's climb was made for the steep-sprint specialists then stage 4 presents a summit finish for those who prefer long range attacks over a number of kilometres, but expect the same faces to be at the sharp end of the race as it's do or die for the GC contenders - especially those who are not so comfortable in the time trials. Here is a look at tomorrows finale on the Alto de Usartza...
The Alto de Usartza once again comes after four other classified climbs much akin to yesterdays stage meaning riders already have tired legs before the real battle commences. The climb itself averages just over 6% over a total 7.2km but like today's finish this doesn't tell the full story.
The opening two kilometres of the climb hover around 4-5% which means the pace is likely to be much higher than today's climb which started with stiff 7% sections before levelling out. The Usartza doesn't level in the middle, instead there is a tough 3km section averaging well over 9% and it's here that riders like Porte and Contador will be looking to put in a sustained attack.
|Another up and down day awaits.|
|A good day for the Colombians|
This stage certainly won't be a straight-up two horse race between Porte and Contador though. Indeed Contador will have to pull something special out of the bag here as although he's a good time trialer, Contador doesn't look to be in as good form as Porte is at this stage of the season. But is Porte even still riding for the overall? Team-mate Henao is currently in the race leaders jersey and a good 10 seconds in front of Porte - true, but if it comes down to the time trial then there's only going to be one Sky man leading the charge here, and it isn't Henao. Quintana gained a couple of seconds on Porte and Contador too but his TT let's him down so it will have to be all out attack tomorrow if he wants to feature on the podium.
|Is Peraud a good bet?|
Whatever happens expect a real dog-fight tomorrow. There is a host of riders so closely bunch at the top-end of the classification that it's still all to play for in terms of podium positioning. A word of warning though - climbs like this have produced some stale racing this year with riders more intent on watching the favourites than putting in an attack, to an extent nullifying the race...